@-moz-document url-prefix()
{
  .ui-select .ui-btn select
  {
    opacity:.0001
  }
}
@document url("http://www.w3.org/Style/CSS/")
{
  #summary
  {
    background:yellow;
    color:black
  }
}
@document url-prefix("http://www.w3.org/Style/CSS/")
{
  #summary
  {
    background:yellow;
    color:black
  }
}
@document domain("w3.org")
{
  body
  {
    font-size:16px!important
  }
}
@document regexp("http://www.w3.org/TR/\\d{4}/[^/]*-CSS2-\\d{8}/")
{
  body
  {
    font-size:20px!important
  }
}
